5 results about "Critical point drying" patented technology

The invention relates to the technical field of electron microscope sample pretreatment, and discloses a critical point drying control method and device based on online near-infrared monitoring, and the method comprises the steps: obtaining infrared spectrum data, and unmixing the spectrum data to obtain a feature data set of a solvent; outputting a to-be-corrected signal according to the feature data set, correcting the to-be-corrected signal with preset data, and determining a signal feature of the solvent; carrying out dynamic correction on the signal characteristics and a preset characteristic matrix, outputting concentration time sequence data of the solvent, carrying out steady state judgment by combining a preset convergence threshold value, and determining a critical state of the solvent; acquiring control strategy data according to the critical state, analyzing the control strategy data into execution response characteristics, performing multi-channel mapping and correction processing, and outputting a process control signal; and performing control gain correction on the process control signal to finish closed-loop feedback control of the final drying process. The method is based on multi-solvent spectrum sensing and concentration dynamic analysis, and self-adaptive closed-loop control of the critical point drying process is achieved.

The application provides a method for observing glandular hairs of Ainsliaea sinensis by using a scanning electron microscope. The method comprises the following steps: (1) selecting a region to be measured in a leaf blade, cutting a sample, and immersing the sample in an aldehyde fixing solution for fixation and immersion; (2) performing gradient dehydration by using an ethanol solution, performing replacement by using isopentyl acetate, and then performing drying by using a critical point drying instrument; (3) removing non-glandular hairs by using adhesive tape; and (4) then spraying gold and observing under a scanning electron microscope. By using the method, the observation and distribution density statistics of the glandular hairs of Ainsliaea sinensis can be simply, efficiently and accurately completed. By using the method, the problem of uneven leaf blade is well solved, and the problem of non-glandular hairs shielding and interfering with the visual field is completely solved.

1. Name of the product in this design: Critical Point Dryer (Vertical). 2. Purpose of this design: To eliminate liquid surface tension and prevent samples from collapsing, deforming, shrinking, or structurally damaged during drying. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The present application relates to electron microscope sample pre-treatment technical field, disclose a kind of critical point drying control method and device based on online near infrared monitoring, the method comprises: obtaining infrared spectrum data, obtains the characteristic data set of solvent by spectral data unmixing;According to characteristic data set, output the signal to be corrected, and correct with preset data, determine the signal characteristic of solvent;Signal characteristic is dynamically modified with preset characteristic matrix, and the concentration time series data of solvent is output, and steady state determination is carried out in combination with preset convergence threshold, determine the critical state of solvent;According to critical state, obtain control strategy data, analysis is executed response characteristic and carries out multi-channel mapping and correction processing, and output process control signal;Process control signal is controlled gain correction, and the closed-loop feedback control of final drying process is completed.The present application is based on multi-solvent spectrum sensing and concentration dynamic analysis, realizes the adaptive closed-loop control of critical point drying process.

1. Name of the product in this design: Critical Point Dryer (Desktop). 2. Purpose of this design: To eliminate liquid surface tension and prevent samples from collapsing, deforming, shrinking, or structurally damaged during drying. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.